Work holder



Feb. 5,- 1946.-

F. S. GRYLEWICZ EI'AL WORKHOLDER Filed May 31, 1945 U il -Lu Z 5 am? L;5% M..." {a W Patented Feb. 5, 1946 Q worn: noLmnt Frank S. Grylewicz,Cicero, and James C. Harmon I and Delbert V. Witsaman, Chicago, Ill.

v 4 Claims. The current invention'pertains to certainvaluable andinnovatory features ofbetterment-and companying drawing, forming a partof this specification, and such apparatus has been fully 'de; scribedhereinafter, it is to be borne in'mind that the invention is notnecessarily limited and re stricted to the precise and exactdetailsthere'of and that reasonable modifications therein may be availedof without departure from the substance and essence of the invention,asset forth in the appended claims, and without the loss or sacrifice ofany of its material benefits and advantages. 7

For simplicity, in this drawing like reference numerals have beenemployed to designate the same structural parts throughout the severalviews thereof;

Inthisdrawingj Figure 1 is a plan view of a'clutch pressure-platemounted on the new work-holder, a portion of the plate, being omittedfor greater clarity of illustration; Figure 2 is a fragmentaryperspective view of the same elements; i i j T Figure 3 is a perspectiveview of a portiononly of one of the three clamps of the work-holder;

Figure 4 is an enlarged section on line 4- -lof Figurel; and

The round work-piece or clutch-plate Il, whose plane, top surfaceis tobesmoothed or reconditioned by mechanism not shown, has three,equally-spaced, radially-disposed pairs of downwardly or rearwardlyprojecting adjacent lugsor ears l2, l2 with registered,roundiaperturesja i3 therethrough by means or whichjwith connectinginstrumentalities, not shown," the pressure plate, when forming part ofthe complete clutch-appliance in the automobile, is moved forwardly andrearwardly into operative and "inoperative positions. j I

The novel and improvedholder or'mountingappliance for such clutch-plateincludes, in the present instance, around, fiat ring or base ll ofsomewhat greater diameter than the plate II and having a fiat, smooth,top surface.

At each of three points 120 degrees apart, the upper surface of suchbase I4 has an upstanding,

1945', SerialNo 596,960 T Y (01. 51 --217) longitudinally-slotted,radially-disposed plate or bar [5 fastened'edgewise-thereon by a pair ofscrews l6, I6 extending upwardly through countersunkholes through thebase I4, such element 5 i5 extending slightly outwardly beyond thecylindrical edge of'the plate i4,as presented most clearly in Figure 4.

The horizontal rectangular slots ll of all three members are'parallel toand at the same distance above the top fiat face oibase l4. Q

Each of the three radial clamps has an inclined abutment plate i8fastened fixedly to the edge of the part 14 by. a pair of screws l9, l9,as shown inFigures 3 and 4, such inclination being occasioned by thefact that the plate l8 bears against theprotruding end of thecorresponding member l.5, such inclination being outwardly upwards sothat the exteriorrface of element'lB is not vertical but-veryslightlyinclined outwardly from the vertical? V 7 In addition," each'of theclamps includes a. ,U shape yoke 2f, the inner end portions otwhoseparallel side-.arms haveregistered holes 22, 22 of substantially thesame diameterasv that of the apertures I3, I13, which is approximatelythe same lasthewidthoi slot ll; *The intermediate cross-member of eachyoke 2| 1 has a; 'central, screw-threaded hole therethronghaccommodatingascrew 23 fitted at-its Touterfendwith a handle 24; by means or which itmayibfe turned and adjusted to bear in slightly downwardl directedmanner against, and ,as determined'by the outer sloping face of, theabuti'mentmember i8, the width of the latter approximately equalling;the space between the pair of parallel arms of the yoke 2|, element l8therefore determining the lateral position of the yoke and approximatelythatpf the c1utch-p1ate, the distance between the opposite faces or thetwo lugs l2, I: being about that of the width of the mem- Theround'clutch plate to be repaired or rehabilitated is mounted ojn thethree radial "holding or retaining clamps'by inserting a one hea'ded pmr rod 25 at 'eaeh'clamp throughithefive, aligned, more or lessequal-size apertures or holes 22; 13, 11,13, 22 wherebythe clutch-plateis supported by'the three pins 25 resting on the bottom,"smooth-surfaces of'the three slots i1, each meme her 'ISbeing'straddIed by the lugs l2, 12.

Then the three screws 23 are tightened sequentially againstthe'abutmentplates I8 to'draw'the three pins or rods 25 outwardly andfirmly downward slightly ori their corresponding slot bottoms,

'until the clutch-plate-is substantially or actually centered and helddown-rigidly and securely=in In some 'cases, a precise and exactcentering of the plate is not required, but, in any instance,miscentering in substantial degree is not possible by any one clampbecause the other two clamps adjustable screw extended through thescrewpreclude such occurrence, when the third clamp is threaded hole ofeach said yoke and adapted to tightened, due to the angular relations ofthe hear t its inner end ns the rre p ndin clamps toepne another and thelugs on=the:clutclr- 'abutmentzplate whereby :adiustmentct the sevplateto:c'iie.-ribtlier,.

' n n 5 era! screvifisiclanfiis the-Mb i rpiece fixedly in place Asingle work-holder of this type will function for reconditioning, thesurface of each abutmentproperly with a large number of difierent sizesn'fi-l 'l izilate against which its screw bears being inclutch-plateseven though the-lugs of thelatter, -cclined whereby the yoke, whenadjusted by its vary somewhat in sizes and spacings apa'ft. l' wrp the Pw rdly d war ly Not only is this unique andeorigihal appifance 51o=sa-idtsupp rtins surfaca distinctly eflicient in its holdingahdimaixi'taining 3.3111 11. "idrk-iholder having a base and aplucharacteristics but, as indicated, it has -the r idisigality otworkepiece clamping-means on said base, tinct advantage that it canaieeaiiimoaatefla'rge f the ncvel inifirbveihent of said work-piececlamprange of sizes or pieces of work and thatfiregafd ing=meansincluding in combination a plurality less of their dimen u o{ workpiecesupporting-members rigid with :tioh foi Tea 'iijlia and raiiiia lliarrangedabout"a5cdnimon a idinex nbeiswaving-{Supporting-surfaces fmae,'-a 'e=shape gammy-each the agreements section -of the 4 gerewgtmeamflnom"t e eth ough "5 6f 11%; yoke mai in registered"aperresitfierethroug'hfla pm "for each said 'rr'ie'mb'er V. w r m aeanees for doingtne same "work 'ataiaresent in general use.

commodate were-nieces gif difieriit jdiineiiieii's. the sizes of theparts of the work hiil'der aiid g; "'s1iacd"-a'ra iugs on thework-"piece and "to their openings and tsiia'pj 'sitmarue inodified asbear on Sam suppfdrtin'g surface for fthfe correoc'casion dictates'ahdstill bewithinitliejprinciples sponding menili fan "abutmeiiteplate"forie'ach 6f the invention as aeniiea "in the renewing*saidf'yokeiig'iii'iw th amma-s am an faiijustclaims. I eme scrw estiicreethrougl the scre -curettage we'clai'mz j I I so 'newer-eachsaiasekeanua'dapteaiwbear at'it's "1. 'In a work-holder having a'bas'e ands.ipliiiihner ndagamst the corresponding abutmentfality of work-fbice' -cain'p'i'ngus on saiii fiiliite er by a ziie'nt dtftiie severaliscrews Jv iec'e xedlyiniialace'fdrreccn clamping-means meluiiin'glhceiiiblnaticmavpruiimqjxiinefithes partmg surface or 'leah'df saferality of work-apiece supporting-members rigid 85 Inieheis beingthejdttoiii surf-a de 'iof Ta sloft waasem 'bas'e Jana radially:arrang'eii about a TtlirbtihJsiHfii'efiibiphh thrcug'h which "saidcommoncente$aikiinefiibersihaving-t l'ifip'dffiiiis .ifiih. i"sadatefdtc-ejii lid. 1 surfaces allfinitlie' i's rii iplaiiah"ushabeiifcke l'iniaiworklf tierhairingiabasefaifiiaiiilu- Tfo'rfeachlsaid meifibeii, lth'e'i-i'riterinediate rsec'tfdn rality is:workiiieee clah'ijiingiii'eans f on sai'd o'fthe yoke havingascrewmreaueaina e"wer .Ibiisgith' 'direll iii-iiiircveinlnt of said'vidfk-ibiece through and arms .of ,the y'oke Ihaviiig igi'stereuilanib'iiigiiieahs iii'cludihgsin :cdniemiuana blubi'iadaptedtolreinovabiy occupyfid freiiitered with said base and radially arrangedabout a abiturs'in the lyiilr'e-ar'iiis istereaaeer; common center, saidmembershavin'g 's'uiiiaorting lturcsi'n space -sparing o the worlgebieceand intiieg ame piane; a Ushabeiycke "to bearlon sqigsapiiaea gsurfaceof: ape ,earre- 3e1- ieaehgs dlihiiibr, "the iiitriiiediatesectionsiicnaiiig member. Jai -ahiit ii' fi fte 1561:, c 6f"h'$'olieha'vih'g"a'serew-thieaa'e'whble ther gamete 135 i?! w l f ish f i i f throughand.arms ofnthevyoke-having regiaereu z hol'e' =61 acir-ala ykiagllaiqazfifiq ahead be: adapted to removably occupyssia zrgiste'rea its innerend against thelcorrespondmg :abutjinfthayb'keiarmgjnairegistefefiaperen't-pl e. vw e fiir ad ustment 1b: the several maignant-spatelugszam. the'wcrk-iiiece arid 1 reconditioning.

2 fIn a wdi'k-holder havi n'g "a "base-a'nai-a .151 @455 gag 3f; 2:5;%its l s fi ri dfisl 'f t 3 MWQ 'JFP F FP WlfiQPQS}? 953%: Z111}: screw.-ittenisled ctiirough. the 1)screw-thre'aid'e'vzi my ernflve improvemnism W :m care as: dfjeaiidiahatefifto wearer, 1ampin means.mamaingincdinbinationfaifluy rality of 'wbikahiece .supn rtmgaembers ri'id vwithlsaid base and radially -arranged about} common vcenter, saidIni'emb'ers iiavmgsuppm- 7 ing surfaces all in the' saiiielpl'ane, caU-c-"shap'e fydlre for-each saidjiiieniberftheintermediatesecv 7 tion ofthe;yoi re=ha ving at ficrewgtl ilfaged hole jpfin s fiheliiniqiifiwdraiyhihafidWhwa1fal bii Sfa he et o e a d msnietyo e angreesiipiioiiting isiiilface, thefs'upbbiting'Jsurface of istrdapertures, sihe' etaroun, ,a gr n fer each aen'bfrtssia m mbersfbemggt'he bot'toirilsur iace said member mat ed t9 r ma =1 j j v5 62' a slotthrough Sim member through winch r i j fi jap i lf i; -WKe-M Q 3 5 -theacorresponding ..-pin .is adapted to extend. teredaperturesainspacedfapartlugs onthe work H ,A lpiece-and toibearJqntsaidsupportingisurface of the corresponding member, an abutmenteplate w r i5; for; eachsaidyszoke --rigid -with-said =base, and} an I r -Diituie'sfin heiy'blge arinsiandfregisteredfaliertures

